Run SMART client Erin Strout flexing her way down the home stretch to a new PR at the 2010 Boston Marathon.

We’ve compiled a list of the most popular spring half and full marathons our clients are doing in 2014 if there’s still enough time to customize a plan on our new app. We’ve also included when your custom training plan would start for each race.

If you don’t have a race scheduled yet sign up and customize your plan before the dates below.